<template>
 <div>
  <div id="list" class="uploader-list"></div>
  <div id="wrapper">
   <div class="uploader-container">
    <div :id="id" limitSize="1" :ext="ext"></div>
    <el-button style="margin-bottom:10px;float:left;" size="small" :loading="uploadLoading" type="success" @click="start">上传到服务器</el-button>
    <el-button style="margin-left: 20px;margin-bottom:10px;float:left;" :disabled="stopBtn" size="small" type="danger" @click="stop">暂停上传</el-button>
   </div>
  </div>
  <div class="el-upload__tip">{{tip}}</div>
  <div class="file-list">
   <ul class="el-upload-list el-upload-list--text">
    <li v-for="file in fileList" :class="['el-upload-list__item', 'is-' + file.status]" :key="file">
     <a class="el-upload-list__item-name">
      <i class="el-icon-document"></i>{{file.name}}
     </a>
     <label class="el-upload-list__item-status-label">
      <i :class="{'el-icon-upload-success': true,'el-icon-circle-check': listType === 'text',
     'el-icon-check': ['picture-card', 'picture'].indexOf(listType) > -1}"></i>
     </label>
     <i class="el-icon-close" @click="removeFile(file)"></i>
     <el-progress
      v-if="file.status === 'uploading'"
      :type="listType === 'picture-card' ? 'circle' : 'line'"
      :stroke-width="listType === 'picture-card' ? 6 : 2"
      :percentage="file.percentage">
     </el-progress>
    </li>
   </ul>
  </div>
 </div>
</template>
<script>
 import '../js/jquery.js'
 import '../js/webuploader.js'
 import { Base64 } from 'js-base64'
 import CryptoJS from 'crypto-js';

 export default{
  name: 'fileUpload',
  props: {
   id: {
    type: String,
    default: function(){
     return "filePicker";
    }
   },
   //上传提示
   tip: {
    type: String,
    default: function(){
     return "";
    }
   },
   //文件后缀名限制
   ext: {
    type: String,
    default: function(){
     return "jpg,jpeg,png,pdf,mp4,avi.mp3";
    }
   },
   //分片大小设置
   chunkSize: {
    type: Number,
    default: function(){
     return 2097152;
    }
   },
   //分片上传重试次数
   chunkRetry: {
    type: Number,
    default: function(){
     return 1;
    }
   },
   //是否自动上传
   auto: {
    type: Boolean,
    default: function(){
     return false;
    }
   },
   //上传文件大小限制
   sizeLimit: {
    type: Number,
    default: function(){
     return 209715200;
    }
   },
   //上传文件数量限制
   countLimit: {
    type: Number,
    default: function(){
     return 5;
    }
   }
  },
  data(){
   return{
    appId: AppConfig.appId,
    securityKey: AppConfig.securityKey,
    checkUrl: AppConfig.checkUrl,
    uploadUrl: AppConfig.uploadUrl,
    mergeUrl: AppConfig.mergeUrl,
    previewName: '选择文件',
    wul_fileMd5: '',
    wul_size: 0,
    wul_fileName: '',
    wul_chunk: 0,
    wul_uploader: '',
    fileList: [],
    listType: 'text',
    percentage: 0,
    fileObject: {
     uid: '',
     name: '',
     ext: '',
     type: '',
     status: '',
     percentage: 0,
     url: ''
    },
    uploadLoading: false,
    stopBtn: true
   }
  },
  methods: {
   /**
    * 获取当前上传列表中的文件
    * @returns {Array|*}
    */
   getFileList: function(){
    return this.fileList;
   },
   //绑定事件
   wul_init: function() {
    //提示只能选择一个文件
    this.wul_uploader.on('filesQueued', function (files) {
     if (files.length > 1) {
      this.$message({
       message: '请选择一张图片',
       type: 'error'
      });
      for (var i = 0; i < files.length; i++) {
       this.wul_uploader.cancelFile(files[i]);
      }
      this.wul_uploader.reset();
      this.wul_fileMd5 = "";
      this.wul_size = 0;
      this.wul_fileName = "";
      this.wul_chunk = 0;  //当前切片数
     }else{
      if( this.fileList.length == this.countLimit ){
       this.$message({
        message: '已经达到上传文件限制数量',
        type: 'error'
       });
      }else{
       //此时往需要上传的文件列表中添加文件
       let file = {
        uid: Date.now() + this.tempIndex++,
        name: files[0].name,
        type: files[0].type,
        ext: files[0].ext,
        status: "ready",
        percentage: 0
       }
       this.fileObject = file;
       this.fileList.push(this.fileObject);
      }
     }
    }.bind(this));

    //文件校验格式和大小
    this.wul_uploader.on('error', function (type) {
      debugger
     if (type == 'Q_EXCEED_SIZE_LIMIT') {
      this.$message({
       message: '文件超过指定大小',
       type: 'error'
      });
     }
     if (type == 'Q_TYPE_DENIED') {
      this.$message({
       message: '文件格式错误，请选择文件',
       type: 'error'
      });
     }
     if (type == 'F_EXCEED_SIZE') {
      this.$message({
       message: "文件超过" + this.sizeLimit / 1024 / 1024 + "M",
       type: 'error'
      });
     }
    }.bind(this));

    //上传进度
    this.wul_uploader.on('uploadProgress', function (file, percentage) {
     this.percentage = percentage * 100;
     this.fileObject.status = "uploading";
     this.fileObject.percentage = this.percentage;
     console.log(this.fileObject.percentage);
    }.bind(this));

    //每次切片上传完成之后的判断
    this.wul_uploader.on('uploadAccept', function (object, ret) {
     if (ret.responseCode != 0) {
      this.wul_uploader.cancelFile(this.wul_uploader.getFiles()[0].id);
     }
    });

    this.wul_uploader.on('uploadBeforeSend', function(object, data, headers) {
     console.log(data);
    });
   },

   option: function(key, val) {
    this.wul_uploader.option(key, val);
    var options = this.wul_uploader.options;
    this.wul_uploader.destroy();  //注销uploader
    this.wul_uploader = WebUploader.create(options);
    this.wul_init();
   },
   start: function(){
    if(this.wul_uploader.getFiles()[0] != null) {
     this.wul_uploader.upload(this.wul_uploader.getFiles()[0].id);
     this.uploadLoading = true;
     this.stopBtn = false;
    } else {
     this.$message({
      message: "请选择上传文件",
      type: 'error'
     });
    }
   },
   stop: function(){
    this.wul_uploader.cancelFile(this.wul_uploader.getFiles()[0].id);
   },
   removeFile: function(file){
    this.fileList.splice(this.fileList.indexOf(file), 1);
   },
   change: function(){
    this.option('accept', {
     title: 'Images',
     extensions: 'gif,jpg,jpeg,bmp,png'
    });
   }
  },
  mounted(){
   WebUploader.Uploader.register({
    "before-send-file": "beforeSendFile",
    "before-send": "beforeSend",
    "after-send-file": "afterSendFile",
   }, {
    beforeSendFile: function (file) {
     var deferred = WebUploader.Deferred();
     this.wul_uploader.md5File(file).then(function (val) {
      this.wul_fileMd5 = val;
      this.wul_size = file.size;
      this.wul_fileName = file.name;
      var timestamp = Date.parse(new Date()) / 1000;
      var signParam = "{chunkSize=" + this.chunkSize + ", fileMd5=" + this.wul_fileMd5 + ", size=" + this.wul_size + ", timestamp=" + timestamp + "}";
      var sign = Base64.encode(CryptoJS.HmacSHA1(signParam, this.securityKey));
      // 获取断点续传位置
      jQuery.ajax({
       type: "POST",
       // 测试
       url: this.checkUrl,
       data: {
        // 文件大小
        size: this.wul_size,
        // 文件唯一标记
        fileMd5: this.wul_fileMd5,
        // 切片大小
        chunkSize: this.chunkSize,
        // 签名
        sign: sign,
        // 应用分配id
        appId: this.appId,
        // 当前时间戳
        timestamp: timestamp

       },
       dataType: "json",
       // 上传失败
       error: function (XMLHttpRequest, textStatus, errorThrown) {
        this.$message({
         message: "上传失败...",
         type: 'error'
        });
        this.uploadLoading = false;
        this.stopBtn = true;
       }.bind(this),
       success: function (response) {
        if (response.responseCode == 0) { // 切片获取成功
         this.wul_chunk = response.chunk;
         deferred.resolve();
        } else { // 切片获取失败,请求成功
         this.wul_uploader.cancelFile(file);  //取消文件上传
         this.$message({
          message: "切片检查失败,请联系管理员",
          type: 'error'
         });
         deferred.resolve();
         this.uploadLoading = false;
         this.stopBtn = true;
        }
       }.bind(this)
      });
      return deferred.promise();
     }.bind(this));
     return deferred.promise();
    }.bind(this),
    beforeSend: function (block) {
     var deferred = WebUploader.Deferred();
     if (block.chunk < this.wul_chunk) {
      return deferred.reject();
     }
     this.wul_uploader.md5File(block.blob).then(function (chunkMd5) {
      var timestamp = Date.parse(new Date()) / 1000;
      var signParam = '{chunk=' + block.chunk + ', chunkMd5=' + chunkMd5 + ', chunkSize=' + this.chunkSize + ', fileMd5=' + this.wul_fileMd5 + ', size=' + this.wul_size + ', timestamp=' + timestamp + '}';
      var signTemp = CryptoJS.HmacSHA1(signParam, this.securityKey);
      var sign = Base64.encode(signTemp);  //获取sign值
      this.wul_uploader.options.formData = {
       'timestamp': timestamp,
       'appId': this.appId,
       'chunk': block.chunk,
       'chunkSize': this.chunkSize,
       'fileMd5': this.wul_fileMd5,
       'chunkMd5': chunkMd5,
       'size': this.wul_size,
       'sign': sign
      };
      deferred.resolve();
     }.bind(this))
     return deferred.promise();
    }.bind(this),
    afterSendFile: function (file) {
     var timestamp = Date.parse(new Date()) / 1000;
     var signParam = "{chunkSize=" + this.chunkSize + ", fileMd5=" + this.wul_fileMd5 + ", fileName=" + file.name + ", size=" + this.wul_size + ", timestamp=" + timestamp + "}";
     var sign = Base64.encode(CryptoJS.HmacSHA1(signParam, this.securityKey));
     // 如果分块上传成功，则通知后台合并分块
     jQuery.ajax({
      type: "POST",
      url: this.mergeUrl,
      data: {
       appId: this.appId,
       fileMd5: this.wul_fileMd5,
       fileName: file.name,
       chunkSize: this.chunkSize,
       sign: sign,
       size: this.wul_size,
       timestamp: timestamp
      },
      success: function (response) {
       if (response.responseCode == 0) {
        this.fileObject.status = "success";
        this.fileObject.percentage = 100;
        this.fileObject.url = response.filePath;
       } else {
        this.fileObject.status = "exception";
        this.$message({
         message: "上传失败,失败原因:" + response.responseMsg,
         type: 'error'
        });
       }
       this.uploadLoading = false;
       this.stopBtn = true;
       this.wul_uploader.reset();
       this.wul_fileMd5 = "";
       this.wul_size = 0;
       this.wul_fileName = "";
       this.wul_chunk = 0;  //当前切片数
      }.bind(this)
     });
    }.bind(this)
   });
   this.wul_uploader = WebUploader.create({
    // swf文件路径
    swf: '../js/Uploader.swf',
    // 文件接收服务端。
    server: this.uploadUrl,
    // 定义选择按钮
    pick: {
     "id": "#" + this.id,
     "innerHTML": this.previewName
    },
    // 自动上传
    auto: this.auto,
    // 禁止浏览器打开文件
    disableGlobalDnd: true,
    // 添加截图功能
    paste: '#wrapper',
    // 定义拖动面板
    dnd: '#wrapper',
    // 分片上传
    chunked: true,
    // 分片大小为2M
    chunkSize: this.chunkSize,
    // 分片上传失败重试次数
    chunkRetry: this.chunkRetry,
    // 图片不做压缩
    compress: false,
    // 队列设置10个,为了选择多个文件的时候能提示
    fileNumLimit: 10,
    // 提前准备好下一个文件
    prepareNextFile: true,
    // 限制单个文件大小
    fileSingleSizeLimit: this.sizeLimit,
    //线程数
    threads : 1,
    // 限制格式
    accept: {
     title: "access",
     extensions: this.ext
    }
   });
   this.wul_init();
  }
 }
</script>
<style>
 /* ----------------Reset Css--------------------- */
 html, body, div, span, applet, object, iframe, h1, h2, h3, h4, h5, h6, p, blockquote, pre,
 a, abbr, acronym, address, big, cite, code, del, dfn, em, img, ins, kbd, q, s, samp,
 small, strike, strong, sub, sup, tt, var, b, u, i, center, dl, dt, dd, ol, ul, li,
 fieldset, form, label, legend, table, caption, tbody, tfoot, thead, tr, th, td,
 article, aside, canvas, details, figcaption, figure, footer, header, hgroup, menu, nav, section, summary,
 time, mark, audio, video, input {
  margin: 0;
  padding: 0;
  border: none;
  outline: 0;
  font-size: 100%;
  font: inherit;
  vertical-align: baseline;
 }

 html, body, form, fieldset, p, div, h1, h2, h3, h4, h5, h6 {
  -webkit-text-size-adjust: none;
 }

 article, aside, details, figcaption, figure, footer, header, hgroup, menu, nav, section {
  display: block;
 }

 body {
  font-family: arial, sans-serif;
 }

 ol, ul {
  list-style: none;
 }

 blockquote, q {
  quotes: none;
 }

 blockquote:before, blockquote:after, q:before, q:after {
  content: '';
  content: none;
 }

 ins {
  text-decoration: none;
 }

 del {
  text-decoration: line-through;
 }

 table {
  border-collapse: collapse;
  border-spacing: 0;
 }

 /* ------------ */
 #wrapper {
  width: 100%;
  margin: 0 auto;
  height: 35px;
 }

 .img-preview {
  width: 160px;
  height: 90px;
  margin-top: 1em;
  border: 1px solid #ccc;
 }

 .cropper-wraper {
  position: relative;
 }

 .upload-btn {
  background: #ffffff;
  border: 1px solid #cfcfcf;
  color: #565656;
  padding: 10px 18px;
  display: inline-block;
  border-radius: 3px;
  margin-left: 10px;
  cursor: pointer;
  font-size: 14px;

  position: absolute;
  right: 1em;
  bottom: 2em;
 }
 .upload-btn:hover {
  background: #f0f0f0;
 }
 .uploader-container{
  width: 100%;
  font-size: 10px;
 }

 .webuploader-container {
  position: relative;
  width: 100px;
  height: 21px;
  float: left;
 }
 .webuploader-element-invisible {
  position: absolute !important;
  clip: rect(1px 1px 1px 1px); /* IE6, IE7 */
  clip: rect(1px,1px,1px,1px);
 }
 .webuploader-pick {
  position: relative;
  display: inline-block;
  cursor: pointer;
  background: #00b7ee;
  padding: 6px 15px;

  color: #fff;
  text-align: center;
  border-radius: 3px;
  overflow: hidden;
 }
 .webuploader-pick-hover {
  background: #00a2d4;
 }

 .webuploader-pick-disable {
  opacity: 0.6;
  pointer-events:none;
 }
 .file-list{
  width: 100%;
 }
</style>
